75617

Run ID	Author	Problem	Lang	Verdict	Time	Memory	Code Length	Submit Time
75617	sh25_shenpy	求阴影面积	C++	Accepted	0 MS	248 KB	155	2025-12-08 16:59:44

#include<bits/stdc++.h> using namespace std; int main(){ int n; double s; cin>>n; s=n*n/4; cout<<fixed<<setprecision(2)<<s; return 0;}